Modified succinimides (III)

Abstract

Disclosed herein are additives which are useful as dispersants and detergents in lubricating oils. In particular, this invention is directed toward polyamino alkenyl or alkyl succinimides which have been modified by treatment with a compound of the formula: ##STR1## wherein W is oxygen or sulfur; X is oxygen, sulfur or R 5 N< wherein R 5 is hydrogen, and alkyl of from 1 to 20 carbon atoms; and R 4 is an alkylene group of from 2 to 5 carbon atoms or an alkylene group of from 2 to 5 carbon atoms substituted with from 1 to 3 alkyl groups of from 1 to 2 carbon atoms each with the proviso that both W and X are not both oxygen. The modified polyamino alkenyl or alkyl succinimides of this invention have been found to possess dispersancy and detergency in lubricating oils. These modified succinimides are also useful as dispersants and detergents in fuels.

What is claimed is: 
     
       1. A polyamino alkenyl or alkyl succinimide wherein one or more of the nitrogens of the polyamino moiety is substituted with ##STR23## wherein W is oxygen or sulfur; X is oxygen, sulfur or R 5  N< wherein R 5  is hydrogen or alkyl of from 1 to 20 carbon atoms; and R 4  is an alkylene group of from 2 to 5 carbon atoms or an alkylene group of from 2 to 5 carbon atoms substituted with from 1 to 3 alkyl groups of from 1 to 2 carbon atoms each with the proviso that both W and X are not both oxygen. 
     
     
       2. The polyamino alkenyl or alkyl succinimide as defined in claim 1 wherein W is oxygen and X is >NR 5 . 
     
     
       3. The polyamino alkenyl or alkyl succinimide as defined in claim 1 wherein W is sulfur and X is >NR 5 . 
     
     
       4. The polyamino alkenyl or alkyl succinimide as defined in claim 1 wherein W is oxygen and X is sulfur. 
     
     
       5. The polyamino alkenyl or alkyl succinimide as defined in claim 1 wherein W is sulfur and X is sulfur. 
     
     
       6. A compound of the formula: ##STR24## wherein a is an integer from 1 to 6; R is alkenyl or alkyl of from 10 to 300 carbon atoms; R 2  is alkylene of from 2 to 10 carbon atoms; R 8  is hydrogen, alkyl of from 1 to 6 carbon atoms and ##STR25## wherein W is oxygen or sulfur; X is oxygen, sulfur or >NR 5  wherein R 5  is hydrogen or alkyl of from 1 to 20 carbon atoms; and R 4  is an alkylene group of from 2 to 5 carbon atoms or an alkylene group of from 2 to 5 carbon atoms substituted with from 1 to 3 alkyl groups of from 1 to 2 carbon atoms each with the proviso that X and W are not both oxygen; T is --NHR 8  or ##STR26## wherein R 8  and R are as defined above with the further proviso that the compound contains at least one R 8  which is ##STR27## 
     
     
       7. The compound as defined in claim 6 wherein W is sulfur and X is >NR 5 . 
     
     
       8. The compound as defined in claim 6 wherein W is oxygen and X is >NR 5 . 
     
     
       9. The compound as defined in claim 6 wherein W is oxygen and X is sulfur. 
     
     
       10. The compound as defined in claim 6 wherein W and X are both sulfur. 
     
     
       11. A lubricating oil composition comprising an oil of lubricating viscosity and an amount effective to provide dispersancy of a compound as defined in claim 1. 
     
     
       12. A lubricating oil concentrate comprising from about 90 to 10 weight percent of an oil of lubricating viscosity and from about 10 to 90 weight percent of a compound defined in claim 1. 
     
     
       13. A compound as defined in claim 6 wherein R is alkenyl or alkyl of from 20 to 100 carbon atoms. 
     
     
       14. A compound as defined in claim 13 wherein R 2  is alkylene of from 2 to 6 carbon atoms. 
     
     
       15. A compound as defined in claim 14 wherein R 4  is a 3 or 4 carbon alkylene group. 
     
     
       16. A compound as defined in claim 8 wherein R 5  is hydrogen.